| 1 | /* zconf.h -- configuration of the zlib compression library |
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| 2 | * Copyright (C) 1995-1998 Jean-loup Gailly. |
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| 3 | * For conditions of distribution and use, see copyright notice in zlib.h |
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| 4 | */ |
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| 5 | |
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| 6 | /* @(#) $Id$ */ |
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| 7 | |
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| 8 | #ifndef _ZCONF_H |
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| 9 | #define _ZCONF_H |
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| 10 | |
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| 11 | /* The memory requirements for deflate are (in bytes): |
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| 12 | (1 << (windowBits+2)) + (1 << (memLevel+9)) |
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| 13 | that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) |
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| 14 | plus a few kilobytes for small objects. For example, if you want to reduce |
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| 15 | the default memory requirements from 256K to 128K, compile with |
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| 16 | make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" |
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| 17 | Of course this will generally degrade compression (there's no free lunch). |
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| 18 | |
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| 19 | The memory requirements for inflate are (in bytes) 1 << windowBits |
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| 20 | that is, 32K for windowBits=15 (default value) plus a few kilobytes |
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| 21 | for small objects. |
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| 22 | */ |
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| 23 | |
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| 24 | /* Maximum value for memLevel in deflateInit2 */ |
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| 25 | #ifndef MAX_MEM_LEVEL |
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| 26 | # define MAX_MEM_LEVEL 8 |
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| 27 | #endif |
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| 28 | |
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| 29 | /* Maximum value for windowBits in deflateInit2 and inflateInit2. |
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| 30 | * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files |
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| 31 | * created by gzip. (Files created by minigzip can still be extracted by |
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| 32 | * gzip.) |
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| 33 | */ |
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| 34 | #ifndef MAX_WBITS |
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| 35 | # define MAX_WBITS 15 /* 32K LZ77 window */ |
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| 36 | #endif |
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| 37 | |
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| 38 | /* default windowBits for decompression. MAX_WBITS is for compression only */ |
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| 39 | #ifndef DEF_WBITS |
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| 40 | # define DEF_WBITS MAX_WBITS |
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| 41 | #endif |
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| 42 | |
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| 43 | /* default memLevel */ |
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| 44 | #if MAX_MEM_LEVEL >= 8 |
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| 45 | # define DEF_MEM_LEVEL 8 |
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| 46 | #else |
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| 47 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
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| 48 | #endif |
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| 49 | |
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| 50 | /* Type declarations */ |
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| 51 | |
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| 52 | typedef unsigned char Byte; /* 8 bits */ |
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| 53 | typedef unsigned int uInt; /* 16 bits or more */ |
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| 54 | typedef unsigned long uLong; /* 32 bits or more */ |
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| 55 | typedef void *voidp; |
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| 56 | |
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| 57 | #endif /* _ZCONF_H */ |
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| 58 | |
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